CN105317682B - Air-conditioning system and its compressor - Google Patents

Abstract

The invention discloses an air conditioning system and its compressor. The compressor includes a pump body assembly and a liquid separator. The pump body assembly includes an upper cylinder, a lower cylinder, a lower flange and a cover plate; The lower cylinder control channel; the lower flange has a flange suction port and a lower flange control channel connected with the lower cylinder control channel, the suction end of the flange suction port is connected with an external pipe, and the external pipe is connected to the separator A first control valve is set between the suction port, and a second control valve is set between the external pipe and the exhaust port of the compressor; the first outlet pipe of the liquid separator communicates with the lower suction port of the lower cylinder, and the liquid is separated The second outlet pipe of the device communicates with the upper suction port of the upper cylinder, and the first outlet pipe is provided with a one-way valve leading in the direction of the liquid distributor to the lower cylinder. The compressor provided by the invention reduces the minimum refrigerating capacity of the compressor, expands the refrigerating range of the compressor, and improves the energy efficiency of the compressor at low frequencies.

Description

Air conditioning system and its compressor

technical field

The invention relates to the technical field of refrigeration equipment, in particular to an air conditioning system and a compressor thereof.

Background technique

As the demand for energy saving and emission reduction continues to increase, the demand for the refrigeration range of compressors also increases.

Currently, the two-cylinder compressor is limited by the minimum operating frequency of the compressor, so that the minimum cooling capacity of the compressor is limited, that is, the minimum cooling capacity of the compressor is higher than the cooling demand, which will cause energy waste. Moreover, when the compressor is close to the minimum operating frequency, the rotational speed of the compressor is low, and at this time, the energy efficiency of the compressor is also significantly reduced.

Therefore, how to reduce the minimum cooling capacity and improve energy efficiency at low frequencies is an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of this, the present invention provides a compressor to reduce the minimum cooling capacity and improve energy efficiency at low frequencies. The present invention also provides an air conditioning system with the above-mentioned compressor.

To achieve the above object, the present invention provides the following technical solutions:

A compressor, including a pump body assembly and a liquid distributor, the pump body assembly includes an upper cylinder, a lower cylinder, and a lower flange;

The lower cylinder is provided with a lower cylinder control channel communicating with its compression chamber;

The lower flange has a flange suction port and a lower flange control passage communicated with the lower cylinder control passage, the suction end of the flange suction port is connected with an external pipe, and the external pipe is connected to the A first control valve is provided between the suction port of the liquid distributor, and a second control valve is provided between the external pipe and the exhaust port of the compressor;

The first outlet pipe of the liquid distributor communicates with the lower suction port of the lower cylinder, the second outlet pipe of the liquid distributor communicates with the upper suction port of the upper cylinder, and the first outlet pipe A one-way valve leading along the direction of the liquid distributor to the lower cylinder is arranged on the top.

Preferably, in the above-mentioned compressor, the lower flange also has a positioning channel corresponding to the sliding vane provided on the lower cylinder;

The cover plate of the compressor is connected to the lower flange, an elastic device is provided on the cover plate of the compressor, and a positioning part for positioning the lower slide is provided at the end of the elastic device away from the cover plate , the positioning component is slidably sealed in the positioning channel, and the lower flange control channel communicates with the part of the positioning channel that accommodates the elastic device.

Preferably, in the above-mentioned compressor, a ventilation groove is provided on the cover plate, and the positioning passage communicates with the control passage of the lower flange through the ventilation groove.

Preferably, in the above-mentioned compressor, a limiting groove for limiting the elastic device is provided on the cover plate, and the limiting groove communicates with the ventilation groove.

Preferably, in the above-mentioned compressor, the sliding slide has a groove adapted to the end of the positioning member away from the cover plate.

Preferably, in the above-mentioned compressor, the positioning component has a positioning section matched with the groove and a sealing section connected with the elastic device, and the diameter of the positioning section is smaller than that of the sealing section.

Preferably, in the above-mentioned compressor, the sealing section has a positioning groove that cooperates with the end of the elastic device away from the cover plate.

Preferably, in the above-mentioned compressor, a filter is arranged on the external pipe.

Preferably, in the above compressor, both the first control valve and the second control valve are solenoid valves.

The present invention also provides an air-conditioning system, including a compressor, wherein the compressor is the compressor described in any one of the above.

It can be seen from the above-mentioned technical solution that, in the compressor provided by the present invention, when the first control valve is opened and the second control valve is closed, the one-way valve communicates, and the air enters the downward cylinder, and the compressor is in a dual-cylinder operation state; and When the first control valve is closed and the second control valve is opened, the one-way valve is closed, the upward cylinder takes in air, and the compressor is in a single-cylinder operating state. In the compressor provided by the present invention, the switching of the one-way valve is controlled through the switching of the first control valve and the second control valve, and the switching of the single and double cylinders of the compression cylinder is completed. When the cooling capacity demand of the compressor is low, the refrigerant only needs to enter the upper cylinder for compression, thereby effectively reducing the minimum cooling capacity of the compressor and expanding the cooling range of the compressor; and, in the low frequency state of the compressor (compressor When the demand for cooling capacity is low), since the refrigerant directly enters the upper cylinder, the volume of the compression chamber is equal to the volume of the compression chamber of the upper cylinder, thereby improving the energy efficiency of the compressor at low frequencies.

The present invention also provides an air-conditioning system, including a compressor, wherein the compressor is any one of the above-mentioned compressors. Since the above-mentioned compressor has the above-mentioned technical effect, the air-conditioning system having the above-mentioned compressor should also have the same technical effect, which will not be described in detail here.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the air conditioning system provided by the embodiment of the present invention;

Fig. 2 is a schematic cross-sectional view of a compressor provided by an embodiment of the present invention;

3 is an exploded schematic diagram of a pump body assembly provided by an embodiment of the present invention;

4 is a schematic cross-sectional view of a pump body assembly provided by an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a cover plate provided by an embodiment of the present invention;

Fig. 6 is a schematic structural view of a lower flange provided by an embodiment of the present invention;

Fig. 7 is a schematic structural view of the lower cylinder provided by the embodiment of the present invention;

Fig. 8 is a schematic structural diagram of the sliding slide provided by the embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a positioning component provided by an embodiment of the present invention.

in,

Housing—1, second control valve—2, first control valve—3, liquid distributor—4, one-way valve—5, second outlet pipe—6, first outlet pipe—7, external pipe—8, Filter—9, crankshaft—11, upper flange—12, upper cylinder—13, upper suction port—131, partition—14, lower cylinder—15, lower suction port—151, lower flange—16, Cover plate—17, ventilation groove—171, limit groove—172, sliding piece—18, groove—181, elastic device—19, positioning part—20, positioning section—201, sealing section—202, positioning groove—203 , Flange suction port—a, lower flange control channel—b, positioning channel—c, lower cylinder control channel—d, compressor—A, evaporator—B, expansion valve—C, condenser—D.

detailed description

The invention discloses a compressor to reduce the minimum cooling capacity and improve the energy efficiency at low frequency. The present invention also provides an air conditioning system with the above-mentioned compressor.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-4, Figure 1 is a schematic structural view of a compressor provided by an embodiment of the present invention; Figure 2 is a schematic cross-sectional view of a compressor provided by an embodiment of the present invention; Figure 3 is a schematic diagram of a pump body provided by an embodiment of the present invention Exploded schematic diagram of the assembly; FIG. 4 is a schematic cross-sectional view of the pump body assembly provided by the embodiment of the present invention.

The embodiment of the present invention provides a compressor, which includes a casing 1, a pump body assembly arranged inside the casing 1, and a liquid separator 4 arranged outside the casing 1. The pump body assembly includes a crankshaft 11 and a pump body assembly arranged on the crankshaft 11. Upper flange 12, upper cylinder 13, dividing plate 14, lower cylinder 15, lower flange 16 and cover plate 17.

Wherein, the lower cylinder 15 is provided with a lower cylinder control passage d communicating with its compression chamber; the lower flange 16 has a flange suction port a and a lower flange control passage b communicating with the lower cylinder control passage d, and the flange suction The suction end of the mouth is connected with an external pipeline 8, a first control valve 3 is arranged between the external pipeline 8 and the suction port of the liquid separator, and a second control valve is arranged between the external pipeline 8 and the exhaust port of the compressor 2; the first outlet pipe 7 of the liquid distributor 4 communicates with the lower suction port 151 of the lower cylinder 15, the second outlet pipe 6 of the liquid distributor 4 communicates with the upper suction port 131 of the upper cylinder 13, and the first outlet pipe 7 is provided with a one-way valve 5 leading to the direction of the lower cylinder 15 along the liquid separator 4 .

The single and double cylinder switching process of the compressor provided by the embodiment of the present invention is as follows:

When switching from a single-cylinder state to a double-cylinder state, the first control valve 3 is opened and the second control valve 2 is closed. Since the refrigerant in the low-pressure state enters the compressor A through the liquid separator 4, the suction port of the liquid separator 4 is at a low pressure. The first control valve 3 is opened so that the suction port of the liquid distributor 4, the external pipe 8, the flange suction port a, the lower flange control channel b, the lower cylinder control channel d, and the lower suction port 151 of the lower cylinder 15 are sequentially connected, so that the suction port of the liquid distributor 4 and the lower suction port 151 of the lower cylinder 15 are both at low pressure, that is, the pressure at both ends of the check valve 5 on the first outlet pipe 7 is low pressure, and the check valve 5 guides Pass. The refrigerant enters the lower cylinder 15 through the liquid separator 4 and the first outlet pipe 7, and the gas compressed by the lower cylinder 15 enters the upper cylinder 13 from the outlet end of the lower cylinder 15 to complete the two-stage compression, that is, the compressor is transferred into the double cylinder run.

When switching from a double-cylinder state to a single-cylinder state, the first control valve 3 is closed and the second control valve 2 is opened. Since the discharge port of compressor A is the refrigerant compressed by compressor A, the discharge port of compressor A is at high pressure. The second control valve 2 is opened so that the exhaust port of the compressor A, the external pipe 8, the flange suction port a, the lower flange control channel b, the lower cylinder control channel d and the lower suction port 151 of the lower cylinder 15 are connected in sequence , so that the lower suction port 151 of the lower cylinder 15 is in a high-pressure state, while the suction port of the liquid separator 4 is in a low-pressure state, that is, the check valve 5 on the first outlet pipe 7 and the lower suction port of the lower cylinder 15 The pressure at the end connected to 151 is high pressure, while the pressure at the end of the one-way valve 5 close to the liquid distributor 4 is low pressure. Since the one-way valve 5 leads in the direction of the liquid distributor 4 to the lower cylinder 15, the single to valve 5. The refrigerant enters the upper cylinder 13 through the liquid separator 4 and the second outlet pipe 6, and the compressor turns into a single-cylinder operation.

In the compressor provided by the embodiment of the present invention, when the first control valve 3 is opened and the second control valve 2 is closed, the one-way valve 5 is communicated, and the air is sucked into the lower cylinder 15, and the compressor is in a dual-cylinder operation state; while in the first When the control valve 3 is closed and the second control valve 2 is opened, the one-way valve 5 is closed, and the upper cylinder 13 takes in air, and the compressor is in a single-cylinder operating state. In the compressor provided by the embodiment of the present invention, the switching of the one-way valve 5 is controlled through the switching of the first control valve 3 and the second control valve 2, and the switching between single and double cylinders of the compression cylinder is completed. When the cooling capacity demand of the compressor is low, the refrigerant only needs to enter the upper cylinder 13 for compression, thereby effectively reducing the minimum cooling capacity of the compressor and expanding the cooling range of the compressor; and, in the low frequency state of the compressor (compression When the refrigeration capacity demand of the machine is low), since the refrigerant directly enters the upper cylinder 13, the volume of the compression chamber is equal to the volume of the compression chamber of the upper cylinder 13, thereby improving the energy efficiency of the compressor at low frequencies.

Wherein, the upper cylinder 13 and the lower cylinder 15 are separated by a partition 14 .

As shown in Fig. 3 and Fig. 4, the lower flange 16 also has a positioning channel c corresponding to the sliding plate 18 provided on the lower cylinder 15; the cover plate 17 is connected to the lower flange 16, and is arranged on the lower flange 16 away from the lower cylinder 15 One side of the cover plate 17 is provided with an elastic device 19, and the end of the elastic device 19 away from the cover plate 17 is provided with a positioning part 20 for positioning the sliding slide 18. The positioning part 20 is slid and sealed in the positioning channel c, and the lower flange controls The channel b communicates with the part of the positioning channel c that accommodates the elastic device 19 .

When switching from the single-cylinder state to the double-cylinder state, since the positioning part 20 is slidably sealed in the positioning passage c, the lower flange control passage b communicates with the part of the positioning passage c that accommodates the elastic device 19, so that the positioning part 20 is connected to the elastic device 19 The pressure at the connection end is low pressure, while the pressure at the end of the positioning part 20 close to the sliding slide 18 is high pressure (the refrigerant enters the lower cylinder 15 and is compressed), the positioning part 20 moves downward against the elastic force of the elastic device 19 under the action of the pressure difference, and the positioning is released. The positioning function of the component 20 on the sliding slide 18, the sliding slide 18 moves inside the lower cylinder 15 and offsets the lower roller to compress the lower cylinder 15, and then enters the upper cylinder 13 from the outlet end of the lower cylinder 15, and the compressor turns into Two-cylinder operation.

When switching from the double-cylinder state to the single-cylinder state, since the positioning part 20 is slidably sealed in the positioning passage c, the lower flange control passage b communicates with the part of the positioning passage c containing the elastic device 19, so that the pressure at both ends of the positioning part 20 is even. For low pressure, the positioning part 20 moves upward under the elastic force of the elastic device 19 and fits with the sliding slide 19 . The action of the lower roller pushes the lower slide 19, so that the positioning component 20 is in contact with the lower slide 19, and the lower cylinder 15 stops compressing.

Through the above arrangement, the movement of the lower vane 19 in the single-cylinder state is effectively avoided, thereby reducing the energy consumption of the compressor in the single-cylinder state, and further improving the energy efficiency of the compressor at low frequencies.

As shown in FIG. 5 and FIG. 6 , a ventilation groove 171 is provided on the cover plate 17 , and the positioning passage c communicates with the lower flange control passage b through the ventilation groove 171 . After the cover plate 17 and the lower flange 16 are relatively installed, the ends of the positioning channel c and the lower flange control channel b close to the cover plate 17 are connected with the ventilation groove 171, and since the elastic device 19 is connected to the cover plate 17, the lower The flange control channel b communicates with the part of the positioning channel c that accommodates the elastic device 19 . It is also possible to directly set a connecting channel connecting the lower flange control channel b and the positioning channel c to accommodate the part of the elastic device 19 in the lower flange 16 , which will not be introduced one by one here and are all within the scope of protection.

Effectively, the elastic means 19 are springs. Since the spring is a hollow structure, it facilitates the communication between the lower flange control passage b and the positioning passage c for accommodating the elastic device 19 .

Further, the cover plate 17 is provided with a limiting groove 172 for limiting the elastic device 19 , and the end of the spring serving as the elastic device 19 is arranged in the limiting groove 172 , which effectively improves the stability of the elastic device 19 . Moreover, the limiting groove 172 communicates with the ventilation groove 171 .

As shown in FIG. 7 , the lower cylinder control channel d directly communicates with the lower suction port 151 of the lower cylinder 15 . It is also possible to diverge the lower cylinder control channel d from the lower suction port 151 , and complete the communication between the two through the compression chamber of the lower cylinder 15 .

As shown in FIGS. 3 and 8 , the sliding slide 18 has a groove 181 adapted to the end of the positioning component 20 away from the cover plate 17 . That is, the end of the positioning component 20 away from the cover plate 17 is inserted into the groove 181 , thereby completing the positioning of the positioning component 20 . It is also possible to contact the end wall of the sliding slide 18 with the end of the positioning member 20 far away from the cover plate 17, so as to complete the positioning of the sliding slide 18, which will not be described in detail here and is within the scope of protection.

A stepped cylindrical pin is preferably used as the positioning member 20 .

As shown in FIG. 9 , the positioning component 20 has a positioning section 201 matched with the groove 181 and a sealing section 202 connected with the elastic device 19 . The diameter of the positioning section 201 is smaller than that of the sealing section 202 . It is also possible to use a cylindrical or prismatic device as the positioning member 20, it is only necessary to ensure that its side wall is in sliding and sealing fit with the positioning channel c.

Further, the sealing section 202 has a positioning groove 203 matching with an end of the elastic device 19 away from the cover plate 17 . Inserting the end of the elastic device 19 away from the cover plate 17 into the positioning groove 203 effectively ensures the stability of the connection between the elastic device 19 and the positioning component 20 .

As shown in FIG. 1 , a filter 9 is arranged on the external pipe 8 . That is, the first control valve is arranged between the inlet end of the filter and the suction port of the liquid separator, and the second control valve is arranged between the suction port of the flange and the discharge port of the compressor. Prevent impurities in the refrigerant from entering the compressor.

Preferably, both the first control valve 3 and the second control valve 2 are solenoid valves. It is also possible to set the first control valve 3 and the second control valve 2 as manual valves, which are not specifically limited here.

An embodiment of the present invention also provides an air conditioning system, including a compressor A, where the compressor A is any one of the above compressors. Since the above-mentioned compressor has the above-mentioned technical effect, the air-conditioning system having the above-mentioned compressor should also have the same technical effect, which will not be described in detail here.

Taking the cooling state as an example, the refrigerant exchanges heat with the indoor air in the evaporator B of the indoor unit, then flows into the compressor A to be compressed, flows into the condenser D of the outdoor unit, and then flows back to the evaporator B after passing through the expansion valve C.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A compressor, characterized in that it comprises a pump body assembly and a liquid separator (4), and said pump body assembly includes an upper cylinder (13), a lower cylinder (15) and a lower flange (16); The lower cylinder (15) is provided with a lower cylinder control channel (d) communicating with its compression chamber; The lower flange (16) has a flange suction port (a) and a lower flange control passage (b) communicated with the lower cylinder control passage (d), the suction end of the flange suction port An external pipeline (8) is connected, and a first control valve (3) is arranged between the external pipeline (8) and the suction port of the liquid distributor, and the external pipeline (8) is connected to the air inlet of the compressor. A second control valve (2) is arranged between the exhaust ports; The first outlet pipe (7) of the liquid distributor (4) communicates with the lower suction port (151) of the lower cylinder (15), and the second outlet pipe (6) of the liquid distributor (4) It communicates with the upper suction port (131) of the upper cylinder (13), and the first outlet pipe (7) is provided with a guide along the direction of the liquid distributor (4) to the lower cylinder (15). through check valve (5). 2. The compressor according to claim 1, characterized in that, the lower flange (16) also has a positioning channel (c) corresponding to the lower slide (18) provided on the lower cylinder (15) ; The cover plate (17) of the compressor is connected with the lower flange (16), the cover plate (17) of the compressor is provided with an elastic device (19), and the elastic device (19) is far away from the One end of the cover plate (17) is provided with a positioning part (20) for positioning the lower slide (18), the positioning part (20) is slidably sealed in the positioning passage (c), and the lower flange controls The channel (b) communicates with the part of the positioning channel (c) that accommodates the elastic means (19). 3. The compressor according to claim 2, characterized in that, the cover plate (17) is provided with a ventilation groove (171), the positioning channel (c) and the lower flange control channel (b) It communicates through the air groove (171). 4. The compressor according to claim 3, characterized in that, the cover plate (17) is provided with a limiting groove (172) for limiting the elastic device (19), and the limiting groove (172) It communicates with the ventilation groove (171). 5. The compressor according to claim 2, characterized in that, said lower slide (18) has a groove ( 181). 6. The compressor according to claim 5, characterized in that, the positioning component (20) has a positioning segment (201) that fits with the groove (181) and a positioning segment (201) that is connected with the elastic device (19). The sealing section (202), the diameter of the positioning section (201) is smaller than the diameter of the sealing section (202). 7. The compressor according to claim 6, characterized in that, the sealing section (202) has a positioning groove (203) matching the end of the elastic device (19) away from the cover plate (17) . 8. The compressor according to claim 1, characterized in that a filter (9) is arranged on the external pipe (8). 9. The compressor according to any one of claims 1-8, characterized in that, both the first control valve (3) and the second control valve (2) are solenoid valves. 10. An air conditioning system, comprising a compressor (A), characterized in that the compressor (A) is the compressor according to any one of claims 1-9.